Test 2.1 Flashcards
How many fibers are controlled by one motor neuron?
100-1000 fibers
There are few fiber FINE control in your ?
Eye
Many fibers CRUDE control in your?
Leg
Define hypertrophy
Increase in muscle fiber size
Blood travels from the heart using which two circuits?
Pulmonary
Systemic
What does the pulmonary circuit refer to?
The lungs
What does the systemic circuit refer to?
Feeds the tissue
Where is the heart located
In the thoracic cavity
The top of the heart is called?
Base
The bottom of the heart is called
Apex
What is the coronary circulation
Hearts blood supply
What is the order of the blood flow for the heart
Right atrium
Right ventricle
Left atrium
Left ventricle
The right and left of the heart are divided by
Interatial septum
Interventricular septum
What are the three layers of the heart?
Epicardium/pericardium-outer
Myocardium-middle
Endocardium-inside
What does the pericardium consist of?
Protective sac covering heart
Double layered
Filled with fluid to reduce friction
What are some characteristic of the skeletal muscle?
Voluntary control
Striated
Multinucleate
Attached to bone
What are some characteristic of cardic muscle?
Involuntary control Striated Mononucleated Only the heart Autorhythmic
What are some difference between right and left ventricles
Right ventricle wall is thinner
Right develops less pressure
Right ventricle is pouch shaped
Left ventricle is round
What are the valves in the heart
Atrioventricular and semilunar
What is the left and right valves of the atrioventricular valve called
R=tricuspid
L=bicuspid
What are the left and right valves of the semilunar called
R=pulmonary
L=aortic
Every muscle cell has ____
1 neuromuscular junction (NMJ)
